Tooth.



G. E. STALLMAN.

TOOTH.

APPLICATION FILED 1320.3, 1909.

Patented July 26, 1910.

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GEORGE E. STALLMAN, OF FORT SAM HOUSTON, TEXAS.

TOOTH.

Specification of Letters Patent.

Patented July 26, 1910.

To all whom it may concern:

Be it known that I, GEORGE E. STALLMAN, a citizen of the United States,residing at Fort Sam Houston, in the county of Bexar and State of Texas,have invented certain new and useful Improvements in Teeth, of which thefollowing is a specification.

My invention relates to new and useful improvements in means forattaching artificial pin crowns to the roots of teeth.

My invention comprises essentially a metal casing, which may preferablybe made of copper and which accurately fits the pin of a crown. It is tobe understood that the pin attached to the crown may be round, square orany desired shape in crosssection, and the metal casing will be formedround or square to accurately fit the pin. The metal casing may berigidly secured to the pin of a crown or may be securely anchored in theroot-canal, as will be hereinafter explained.

In the accompanying drawings, forming a part of this specification andin which like numerals are used to designate like parts through thesame, Figure 1 is a vertical sectional view of a pin-crown, providedwith my improved casing. Fig. 2 is a central vertical sectional view ofa root and crown, showing the means for securing the crown to the root.Fig. 4 is a perspective view of the metal casing with a disk of gold,amalgam or porcelain attached to its lower end by a process known tothose skilled in the art of dentistry. Fig. 3 is a perspective view ofthe root showing the metal casing and disk cemented to the same, andshowing the crown and pin removed.

In the drawings illustrating the preferred embodiment of my invention, 5designates a pin of an artificial crown, said pin being baked into theporcelain 6, as is well known in the manufacture of artificialpin-crowns.

7 designates an open ended substantially cylindrical thin metal casing,surrounding the pin 5 and which is removable from and frictionally heldupon the pin 5. The casing 7 is provided at its lower end with aplurality of openings 8, which are stamped in the casing 7 when the sameis slipped off of the pin 5. The openings 8 are preferably stamped fromwithin outwardly and have outer flared or flanged edges, which engagematerial attached to the casing in the process of its construction, andalso serves the purpose of providing means whereby said casing may bewithdrawn from the canal cavity, by the insertion of a proper instrumentwithin one of the openings 8.

By particular reference to Fig. 2, it will be seen that 9 designatestheroot of a tooth having the usual canal cavity 10. The metal casing 7containing the pin 5 is arranged within the canal cavity 10, the casing7 being provided with a plurality of openings 11 upon its periphery andnear the upper end thereof, which openings cooperate with a suitableform of cement within the canal cavity, for holding the casing 7 withinthe root.

12 designates a gold disk commonly used in the art of dentistry, whichis molded and attached to the lower end of the metal casing 7. The disk12 is shaped to accurately fit the lower end of the root 9 and also theabutting end of the porcelain 6.

Fig. 4 shows the metal casing 7 with the gold disk 12 securely attachedthereto, with the openings 11 stamped at its upper end.

These openings are easily stamped in the casing before cementing saidcasing in the canal cavity 10.

Fig. 8 shows the casing and disk sepa rated from the pin 5. In Fig. 3,also is shown the metal casing 7 with the disk 12 attached thereto, saidcasing being cemented in the canal cavity 10, and the crown 6 with pin 5drawn out of the casing 7. By this construction therefore, I am able toremove the crown from the root 9 by withdrawing the frictionally engagedpin 5 out of the metal casing 7, after said casing has been anchoredwithin the canal cavity 10. It is obvious by reference to Fig. 3, thatthe withdrawal of the pin 5 from the casing 7 will then form a canalleading to the end of the root, thus affording access to the same incases where it is desired to treat the root. In case the withdrawal ofthe pin 5 is not desired, the attachment shown in Fig. t is stamped withopenings 11 and secured to the pin 5 by means of a suitable cement. Thecrown with the casing cemented thereto is then secured in the canalcavity 10 by means of a suitable cement, in which case the crown andeasing are rigidly secured to the root and cannot be removed therefrom.Also in the process of construction a piece of carbon is fitted in themetal casing in order to I open-ended 7 near its lower end with aplurality of openings, of a cap mounted and adapted to conform to theshape of the end of said root, and a pin fixedly mounted upon a crownand adapted for insertion within said casing.

In testimony whereof I aflix my signature 20 in presence of twowitnesses.

GEORGE E. STALLMAN. Witnesses:

GEO. H. MORGAN, WV. T. COLEMAN.

upon said casing 15

